using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using BuzzGUI.Interfaces;

namespace BuzzGUI.Common.Actions.MachineActions
{
	public class AddSequenceAction : MachineAction
	{
		ISong song;

		public AddSequenceAction(IMachine machine)
			: base(machine)
		{
			song = machine.Graph.Buzz.Song;
		}

		protected override void DoAction()
		{
			var mac = Machine;
			if (mac != null) song.AddSequence(mac, song.Sequences.Count);
		}

		protected override void UndoAction()
		{
			var seq = song.Sequences.LastOrDefault();
			if (seq != null) song.RemoveSequence(seq);
		}

	}
}